2024
Glutathione synthesis in the mouse liver supports lipid abundance through NRF2 repression
Asantewaa G, Tuttle E, Ward N, Kang Y, Kim Y, Kavanagh M, Girnius N, Chen Y, Rodriguez K, Hecht F, Zocchi M, Smorodintsev-Schiller L, Scales T, Taylor K, Alimohammadi F, Duncan R, Sechrist Z, Agostini-Vulaj D, Schafer X, Chang H, Smith Z, O’Connor T, Whelan S, Selfors L, Crowdis J, Gray G, Bronson R, Brenner D, Rufini A, Dirksen R, Hezel A, Huber A, Munger J, Cravatt B, Vasiliou V, Cole C, DeNicola G, Harris I. Glutathione synthesis in the mouse liver supports lipid abundance through NRF2 repression. Nature Communications 2024, 15: 6152. PMID: 39034312, PMCID: PMC11271484, DOI: 10.1038/s41467-024-50454-2.Peer-Reviewed Original ResearchConceptsGlutamate-cysteine ligase catalytic subunitLipid abundanceLipogenic enzyme expressionAbundance in vivoLipid productionCatalytic subunitRepress Nrf2Transcription factorsNrf2 repressionAdult tissuesSynthesis of GSHEnzyme expressionNon-redundantRedox bufferMouse liverLoss of GSHTriglyceride productionIn vivo modelsAbundanceGlutathione synthesisLiver balanceFat storesOxidative stressLipidDeletion
2022
Glutathione-dependent redox balance characterizes the distinct metabolic properties of follicular and marginal zone B cells
Franchina DG, Kurniawan H, Grusdat M, Binsfeld C, Guerra L, Bonetti L, Soriano-Baguet L, Ewen A, Kobayashi T, Farinelle S, Minafra AR, Vandamme N, Carpentier A, Borgmann FK, Jäger C, Chen Y, Kleinewietfeld M, Vasiliou V, Mittelbronn M, Hiller K, Lang PA, Brenner D. Glutathione-dependent redox balance characterizes the distinct metabolic properties of follicular and marginal zone B cells. Nature Communications 2022, 13: 1789. PMID: 35379825, PMCID: PMC8980022, DOI: 10.1038/s41467-022-29426-x.Peer-Reviewed Original ResearchConceptsElectron transport chainMarginal zone B cellsMitochondrial electron transport chainGlutamate-cysteine ligaseCatalytic subunitRedox controlCell-specific ablationRedox balanceTransport chainMetabolic dependenciesCysteine ligaseProtein synthesisMetabolite succinateMTOR activationGlutathione synthesisATP levelsMetabolic propertiesB cellsMetabolic principlesMetabolic featuresDistinct metabolic propertiesMZBCellsActivationLigaseLipidomics and Redox Lipidomics Indicate Early Stage Alcohol‐Induced Liver Damage
Koelmel JP, Tan WY, Li Y, Bowden JA, Ahmadireskety A, Patt AC, Orlicky DJ, Mathé E, Kroeger NM, Thompson DC, Cochran JA, Golla JP, Kandyliari A, Chen Y, Charkoftaki G, Guingab‐Cagmat J, Tsugawa H, Arora A, Veselkov K, Kato S, Otoki Y, Nakagawa K, Yost RA, Garrett TJ, Vasiliou V. Lipidomics and Redox Lipidomics Indicate Early Stage Alcohol‐Induced Liver Damage. Hepatology Communications 2022, 6: 513-525. PMID: 34811964, PMCID: PMC8870008, DOI: 10.1002/hep4.1825.Peer-Reviewed Original ResearchConceptsAlcoholic fatty liver diseaseEthanol-treated miceFatty liver diseaseAlcohol consumption altersRegulation of triglycerideLiver lipidomeRegulation of phosphatidylcholineHepatic inflammationLiver biopsyLiver diseaseComprehensive time-course studyLiver damageHistological signsEarly biomarkersHistological markersMouse modelTime-course studyLiver tissueTriglyceridesHistological analysisEarly detectionLipid accumulationLiverMajor lipid classesDiet modelOxidative stress induces inflammation of lens cells and triggers immune surveillance of ocular tissues
Thompson B, Davidson EA, Chen Y, Orlicky DJ, Thompson DC, Vasiliou V. Oxidative stress induces inflammation of lens cells and triggers immune surveillance of ocular tissues. Chemico-Biological Interactions 2022, 355: 109804. PMID: 35123994, PMCID: PMC9136680, DOI: 10.1016/j.cbi.2022.109804.Peer-Reviewed Original ResearchMeSH KeywordsAcetylcysteineAnimalsButhionine SulfoximineCell LineChemokine CCL7CytokinesDown-RegulationEpithelial CellsEpithelial-Mesenchymal TransitionEyeGlutamate-Cysteine LigaseImmunity, InnateLens, CrystallineLeukocytesMiceMice, Inbred C57BLMice, KnockoutOxidative StressReactive Oxygen SpeciesUp-RegulationConceptsPosterior capsule opacificationCytokine expressionKO miceImmune surveillanceOxidative stressLens epithelial cellsOcular structuresLens cellsDevelopment of PCOEpithelial cellsInnate immune cellsExpression of cytokinesEx vivo inductionOcular surface tissuesExpression of markersImmune response genesCON miceControl miceCapsule opacificationImmune cellsPostnatal dayΑ-SMAMouse modelOcular tissuesVivo induction
2021
Oxidative stress and genotoxicity in 1,4-dioxane liver toxicity as evidenced in a mouse model of glutathione deficiency
Chen Y, Wang Y, Charkoftaki G, Orlicky DJ, Davidson E, Wan F, Ginsberg G, Thompson DC, Vasiliou V. Oxidative stress and genotoxicity in 1,4-dioxane liver toxicity as evidenced in a mouse model of glutathione deficiency. The Science Of The Total Environment 2021, 806: 150703. PMID: 34600989, PMCID: PMC8633123, DOI: 10.1016/j.scitotenv.2021.150703.Peer-Reviewed Original ResearchConceptsOxidative stressLiver cytotoxicityGlutamate-cysteine ligase modifier subunitWild-type micePrimary target organRecent mouse studiesCYP2E1 inductionLiver toxicitySubchronic exposureNrf2 inductionOxidative DNA damageCancer riskMouse modelAnti-oxidative responseDNA damageTarget organsAnimal studiesLiver carcinogenicityRedox dysregulationEarly changesHealth CanadaNull miceMouse studiesNuclear factorCarcinogenic mechanismsImpaired GSH biosynthesis disrupts eye development, lens morphogenesis and PAX6 function
Thompson B, Chen Y, Davidson EA, Garcia-Milian R, Golla JP, Apostolopoulos N, Orlicky DJ, Schey K, Thompson DC, Vasiliou V. Impaired GSH biosynthesis disrupts eye development, lens morphogenesis and PAX6 function. The Ocular Surface 2021, 22: 190-203. PMID: 34425299, PMCID: PMC8560581, DOI: 10.1016/j.jtos.2021.08.010.Peer-Reviewed Original ResearchConceptsHEK293T cellsEye developmentGSH biosynthesisTransactivation activityPax6 functionReactive oxygen speciesSubsequent gene ontologyCell identity genesButhionine sulfoximineEpithelial cell identityRNA-seq analysisIngenuity Pathway AnalysisKey upstream regulatorIdentity genesCell identityGene OntologyRNA-seqImmune response genesBioinformatics analysisResponse genesGlutathione biosynthesisLens morphogenesisMolecular consequencesUpstream regulatorMicrophthalmia phenotypeIdentification of Dose-Dependent DNA Damage and Repair Responses From Subchronic Exposure to 1,4-Dioxane in Mice Using a Systems Analysis Approach
Charkoftaki G, Golla JP, Santos-Neto A, Orlicky DJ, Garcia-Milian R, Chen Y, Rattray NJW, Cai Y, Wang Y, Shearn CT, Mironova V, Wang Y, Johnson CH, Thompson DC, Vasiliou V. Identification of Dose-Dependent DNA Damage and Repair Responses From Subchronic Exposure to 1,4-Dioxane in Mice Using a Systems Analysis Approach. Toxicological Sciences 2021, 183: 338-351. PMID: 33693819, PMCID: PMC8921626, DOI: 10.1093/toxsci/kfab030.Peer-Reviewed Original ResearchConceptsDX exposureBile acid quantificationRepair responseBDF-1 miceDNA damageDose-dependent DNA damageEffects of exposureHistopathological studySubchronic exposureImmunohistochemical analysisLiver carcinogenLiver carcinogenicityLiver transcriptomicsDrinking waterMetabolomic profilingMicePotential mechanismsLiverEnvironmental chemicalsState maximum contaminant levelToxic effectsCell deathExposureOxidative stress responsePresent study
2020
Interplay between APC and ALDH1B1 in a newly developed mouse model of colorectal cancer
Golla JP, Kandyliari A, Tan WY, Chen Y, Orlicky DJ, Thompson DC, Shah YM, Vasiliou V. Interplay between APC and ALDH1B1 in a newly developed mouse model of colorectal cancer. Chemico-Biological Interactions 2020, 331: 109274. PMID: 33007288, PMCID: PMC9201852, DOI: 10.1016/j.cbi.2020.109274.Peer-Reviewed Original ResearchConceptsColorectal cancerColonic adenomasPresent preliminary studyMouse modelConsecutive daysLarge colonic adenomaPresence of adenomasApc mouse modelColon tumor growthMouse xenograft modelColon epithelial cellsFurther mechanistic studiesCancer mortalityKO miceLeading causeColorectal adenomasCRC developmentImmunohistochemical analysisXenograft modelTumor growthColorectal tumorigenesisAdenomasExpression scoreMale ApcMiceGlutathione Restricts Serine Metabolism to Preserve Regulatory T Cell Function
Kurniawan H, Franchina DG, Guerra L, Bonetti L, -Baguet LS, Grusdat M, Schlicker L, Hunewald O, Dostert C, Merz MP, Binsfeld C, Duncan GS, Farinelle S, Nonnenmacher Y, Haight J, Das Gupta D, Ewen A, Taskesen R, Halder R, Chen Y, Jäger C, Ollert M, Wilmes P, Vasiliou V, Harris IS, Knobbe-Thomsen CB, Turner JD, Mak TW, Lohoff M, Meiser J, Hiller K, Brenner D. Glutathione Restricts Serine Metabolism to Preserve Regulatory T Cell Function. Cell Metabolism 2020, 31: 920-936.e7. PMID: 32213345, PMCID: PMC7265172, DOI: 10.1016/j.cmet.2020.03.004.Peer-Reviewed Original ResearchConceptsSuppressive capacityRegulatory T cell functionTreg suppressive capacityTreg-specific ablationAnti-tumor responseT cell functionSerine metabolismTreg functionalityFoxp3 expressionPrevent autoimmunitySevere autoimmunityTreg differentiationImmune homeostasisEffector TGlutamate-cysteine ligaseCell responsesTregsMTOR activationMutant miceCell functionAutoimmunitySerine availabilityGlutathione synthesisCysteine ligaseMice
2019
Glutathione deficiency-elicited reprogramming of hepatic metabolism protects against alcohol-induced steatosis
Chen Y, Manna SK, Golla S, Krausz KW, Cai Y, Garcia-Milian R, Chakraborty T, Chakraborty J, Chatterjee R, Thompson DC, Gonzalez FJ, Vasiliou V. Glutathione deficiency-elicited reprogramming of hepatic metabolism protects against alcohol-induced steatosis. Free Radical Biology And Medicine 2019, 143: 127-139. PMID: 31351176, PMCID: PMC6848780, DOI: 10.1016/j.freeradbiomed.2019.07.025.Peer-Reviewed Original ResearchMeSH KeywordsAcetyl Coenzyme AAlcohol DrinkingAMP-Activated Protein KinasesAnimalsEthanolFatty AcidsFatty LiverGlucuronic AcidGlutamate-Cysteine LigaseGlutamatesGlutathioneHomeostasisLipogenesisLiverMaleMiceMice, Inbred C57BLMice, KnockoutOligonucleotide Array Sequence AnalysisOxidation-ReductionOxidative StressPentose Phosphate PathwayProtective AgentsTranscription, GeneticConceptsGlutamate-cysteine ligase modifier subunit geneProtein kinase pathwayAcetyl-CoA fluxMultiple cellular pathwaysAlcohol-induced steatosisCellular stressNucleotide biosynthesisLiver microarray analysisGlobal profilingSubunit geneCellular pathwaysMetabolic reprogrammingKinase pathwayMicroarray analysisMolecular mechanismsGSH poolCellular responsesMetabolic pathwaysLower GSHMolecular pathwaysMetabolic homeostasisAmino acidsDepletion of glutathioneCritical pathogenic eventGlucuronate pathwayExpression, purification and crystallization of the novel Xenopus tropicalis ALDH16B1, a homologue of human ALDH16A1
Pantouris G, Dioletis E, Chen Y, Thompson DC, Vasiliou V, Lolis EJ. Expression, purification and crystallization of the novel Xenopus tropicalis ALDH16B1, a homologue of human ALDH16A1. Chemico-Biological Interactions 2019, 304: 168-172. PMID: 30894314, PMCID: PMC6746316, DOI: 10.1016/j.cbi.2019.03.009.Peer-Reviewed Original ResearchConceptsAldehyde dehydrogenaseCritical Cys residuesPreliminary crystallographic analysisGenomic analysisSf9 cellsCys residuesALDH16A1Novel familyLower animalsSize exclusion chromatographyActive siteStructure determinationMetabolomics studiesCrystallographic analysisCellsMammalsHomologuesGenesExclusion chromatographyFishStructural characteristicsFrogsPathogenesis of goutUnique structural characteristicsResiduesHepatic metabolic adaptation in a murine model of glutathione deficiency
Chen Y, Golla S, Garcia-Milian R, Thompson DC, Gonzalez FJ, Vasiliou V. Hepatic metabolic adaptation in a murine model of glutathione deficiency. Chemico-Biological Interactions 2019, 303: 1-6. PMID: 30794799, PMCID: PMC6743730, DOI: 10.1016/j.cbi.2019.02.015.Peer-Reviewed Original ResearchConceptsCellular non-protein thiolsMetabolic adaptationGlutamate-cysteine ligase modifier subunitNon-protein thiolsHepatic metabolic adaptationCellular redoxGlobal profilingGSH homeostasisModifier subunitLiver developmentBiochemical mechanismsMetabolic homeostasisAmino acidsGclm null miceDefense mechanismsEnvironmental insultsOxidative damageFatty liver developmentNull miceSpectrum of changesNucleic acidsMetabolic signaturesPivotal roleHomeostasisGlutathione deficiency
2018
Engineered Animal Models Designed for Investigating Ethanol Metabolism, Toxicity and Cancer
Marshall S, Chen Y, Singh S, Berrios-Carcamo P, Heit C, Apostolopoulos N, Golla JP, Thompson DC, Vasiliou V. Engineered Animal Models Designed for Investigating Ethanol Metabolism, Toxicity and Cancer. Advances In Experimental Medicine And Biology 2018, 1032: 203-221. PMID: 30362100, PMCID: PMC6743736, DOI: 10.1007/978-3-319-98788-0_14.ChaptersConceptsExact molecular mechanismsMouse modelCellular proteinsEthanol-induced tissue injuryEthanol metabolismEngineered Animal ModelsMolecular mechanismsAldehyde dehydrogenasesLong-term alcohol abuseAlcohol-induced diseasesFurther tissue damageAntioxidant glutathioneImportant mouse modelsCurrent understandingLeading causeTissue injuryIntracellular generationAlcohol abuseAlcohol consumptionAnimal modelsPathogenic eventsPathophysiological consequencesTissue damageMetabolismDNA adductsGlutathione de novo synthesis but not recycling process coordinates with glutamine catabolism to control redox homeostasis and directs murine T cell differentiation
Lian G, Gnanaprakasam JR, Wang T, Wu R, Chen X, Liu L, Shen Y, Yang M, Yang J, Chen Y, Vasiliou V, Cassel TA, Green DR, Liu Y, Fan TW, Wang R. Glutathione de novo synthesis but not recycling process coordinates with glutamine catabolism to control redox homeostasis and directs murine T cell differentiation. ELife 2018, 7: e36158. PMID: 30198844, PMCID: PMC6152796, DOI: 10.7554/elife.36158.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell DifferentiationCell ProliferationDimethyl FumarateGlutamate-Cysteine LigaseGlutamineGlutathioneGlutathione DisulfideHomeostasisLymphocyte ActivationMice, Inbred C57BLOxidation-ReductionOxidative StressReactive Oxygen SpeciesReceptors, Antigen, T-CellTh17 CellsT-LymphocytesT-Lymphocytes, RegulatoryConceptsCell fateDe novo synthesisNovo synthesisCell differentiationT cell differentiationMurine T cell differentiationT cell fateGlutamate-cysteine ligaseLineage choiceRedox demandsGlutathione de novo synthesisRecycling pathwayInhibition of GSHRedox homeostasisGSH biosynthesisGlutamine catabolismRedox balanceModifier subunitEssential precursorIntracellular GSHEssential roleGlutathione disulfideDifferentiationGSH contentGSH
2017
Glutathione Primes T Cell Metabolism for Inflammation
Mak TW, Grusdat M, Duncan GS, Dostert C, Nonnenmacher Y, Cox M, Binsfeld C, Hao Z, Brüstle A, Itsumi M, Jäger C, Chen Y, Pinkenburg O, Camara B, Ollert M, Bindslev-Jensen C, Vasiliou V, Gorrini C, Lang PA, Lohoff M, Harris IS, Hiller K, Brenner D. Glutathione Primes T Cell Metabolism for Inflammation. Immunity 2017, 46: 675-689. PMID: 28423341, DOI: 10.1016/j.immuni.2017.03.019.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsEncephalomyelitis, Autoimmune, ExperimentalEnergy MetabolismGlutamate-Cysteine LigaseGlutamineGlutathioneGlycolysisImmunoblottingInflammationMice, Inbred C57BLMice, KnockoutNFATC Transcription FactorsProto-Oncogene Proteins c-mycReactive Oxygen SpeciesSignal TransductionT-LymphocytesTOR Serine-Threonine KinasesConceptsReactive oxygen speciesMYC transcription factorsConditional gene targetingT cell-specific ablationGlutamate-cysteine ligaseT cell metabolismRapamycin 1Catalytic subunitMetabolic integrationTranscription factorsGene targetingMetabolic reprogrammingBiosynthetic requirementsUnexpected roleExpression of NFATAntiviral defenseCysteine ligaseCell metabolismGSH pathwayMammalian targetGSH productionMurine TGSH deficiencyOxygen speciesCell effector functionsTranscriptomic analysis and plasma metabolomics in Aldh16a1-null mice reveals a potential role of ALDH16A1 in renal function
Charkoftaki G, Chen Y, Han M, Sandoval M, Yu X, Zhao H, Orlicky DJ, Thompson DC, Vasiliou V. Transcriptomic analysis and plasma metabolomics in Aldh16a1-null mice reveals a potential role of ALDH16A1 in renal function. Chemico-Biological Interactions 2017, 276: 15-22. PMID: 28254523, PMCID: PMC5725231, DOI: 10.1016/j.cbi.2017.02.013.Peer-Reviewed Original ResearchMeSH KeywordsAldehyde DehydrogenaseAnimalsDown-RegulationGene Expression ProfilingKidneyLipidsMetabolomicsMiceMice, Inbred C57BLMice, KnockoutMonocarboxylic Acid TransportersMultidrug Resistance-Associated ProteinsMutation, MissenseSequence Analysis, RNASodium-Phosphate Cotransporter Proteins, Type IUp-RegulationConceptsUric acid homeostasisPlasma metabolomicsElevated serum uric acid levelsSerum uric acid levelsDistal convoluted tubule cellsAcid homeostasisUric acid levelsZone 3 hepatocytesConvoluted tubule cellsSingle nucleotide variantsRenal functionKO miceLipid profileKnockout miceMissense single nucleotide variantsTubule cellsRNA-seq analysisKidneyMouse linesAcid levelsMicePotential roleLipid metabolic processMetabolomic analysisCellular lipids
2016
Corneal haze phenotype in Aldh3a1-null mice: In vivo confocal microscopy and tissue imaging mass spectrometry
Chen Y, Jester JV, Anderson DM, Marchitti SA, Schey KL, Thompson DC, Vasiliou V. Corneal haze phenotype in Aldh3a1-null mice: In vivo confocal microscopy and tissue imaging mass spectrometry. Chemico-Biological Interactions 2016, 276: 9-14. PMID: 28038895, DOI: 10.1016/j.cbi.2016.12.017.Peer-Reviewed Original ResearchMeSH KeywordsAldehyde DehydrogenaseAnimalsCorneaCorneal DiseasesCorneal StromaDiazepam Binding InhibitorDisease Models, AnimalDynamic Light ScatteringEpitheliumEpithelium, CornealHistonesLens, CrystallineLipidsMiceMice, Inbred C57BLMice, KnockoutMicroscopy, ConfocalPhenotypeSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationConceptsImaging mass spectrometryCorneal crystallinsNon-catalytic functionsAcyl-CoA binding proteinFirst genetic animal modelCellular transparencyCorneal epithelial homeostasisCorneal hazeEndogenous proteinsKO miceLipid localizationMixed genetic backgroundKnockout miceCorneal phenotypeEpithelial homeostasisProtein profilesWild-type corneasBinding proteinFunctional roleGenetic backgroundLens cataractMass spectrometryConfocal microscopyMolecular changesPhenotypeChronic Glutathione Depletion Confers Protection against Alcohol-induced Steatosis: Implication for Redox Activation of AMP-activated Protein Kinase Pathway
Chen Y, Singh S, Matsumoto A, Manna SK, Abdelmegeed MA, Golla S, Murphy RC, Dong H, Song BJ, Gonzalez FJ, Thompson DC, Vasiliou V. Chronic Glutathione Depletion Confers Protection against Alcohol-induced Steatosis: Implication for Redox Activation of AMP-activated Protein Kinase Pathway. Scientific Reports 2016, 6: 29743. PMID: 27403993, PMCID: PMC4940737, DOI: 10.1038/srep29743.Peer-Reviewed Original ResearchConceptsAlcoholic liver diseaseGclm KO miceLiver steatosisKO miceAlcohol-induced liver steatosisFactor 2 (Nrf2) target genesEthanol-containing liquid dietOxidative stressGclm knockout mouseAlcohol-induced steatosisHepatic lipid profilesProtein kinase pathwayNew therapeutic strategiesNormal hepatic levelsLevels of glutathioneFatty acid oxidationKinase pathwayLiver diseaseLipid profileLiquid dietEthanol clearanceHepatic levelsTherapeutic strategiesKnockout miceSteatosisHeme oxygenase 1 protects ethanol-administered liver tissue in Aldh2 knockout mice
Matsumoto A, Thompson D, Chen Y, Vasiliou V, Kawamoto T, Ichiba M. Heme oxygenase 1 protects ethanol-administered liver tissue in Aldh2 knockout mice. Alcohol 2016, 52: 49-54. PMID: 27139237, DOI: 10.1016/j.alcohol.2016.02.004.Peer-Reviewed Original ResearchConceptsAldh2 knockout miceStress-related proteinsOxidative stress-related proteinsAlanine transaminaseAnti-oxidative proteinsKnockout miceHealthy individualsHepatic tumor necrosis factor alphaLiver tissueProtective factorsTumor necrosis factor alphaSerum alanine transaminaseRecent epidemiological studiesNecrosis factor alphaWild-type miceHeme oxygenase-1Cytochrome P450 2E1ALDH2 proteinProteinAldehyde dehydrogenase 2 geneHepatic malondialdehydeMechanistic explanationInflammatory cytokinesEthanol administrationMechanistic hypothesesALDH3A1 Plays a Functional Role in Maintenance of Corneal Epithelial Homeostasis
Koppaka V, Chen Y, Mehta G, Orlicky DJ, Thompson DC, Jester JV, Vasiliou V. ALDH3A1 Plays a Functional Role in Maintenance of Corneal Epithelial Homeostasis. PLOS ONE 2016, 11: e0146433. PMID: 26751691, PMCID: PMC4708999, DOI: 10.1371/journal.pone.0146433.Peer-Reviewed Original ResearchConceptsCorneal cell proliferationCorneal epithelial homeostasisCell proliferationALDH3A1 expressionEpithelial homeostasisHuman corneal epithelial cell lineDouble knockout miceAnti-proliferation effectCorneal epithelial cell lineCorneal epithelial proliferationAldehyde dehydrogenase 1A1Epithelial cell lineCorneal differentiation markersInner ocular tissuesInverse associationFunctional roleEpithelial proliferationKnockout miceP53 expressionCorneal epitheliumOcular tissuesMouse corneaCalcium concentrationMRNA levelsEpithelial differentiation